Heat sink



FIG. 1 is a top and left side perspective view of a heat sink showing my new design.

FIG. 2 is a bottom and left side perspective view of the heat sink shown in FIG. 1.

FIG. 3 is a front elevational view of the light shown in FIG. 1.

FIG. 4 is a rear elevational view of the light shown in FIG. 1.

FIG. 5 is a top plan view of the light shown in FIG. 1.

FIG. 6 is a bottom plan view of the light shown in FIG. 1.

FIG. 7 is a left side elevational view of the light shown in FIG. 1.

FIG. 8 is a sectional view taken along line A-A' of FIG. 3.

FIG. 9 is a sectional view taken along line B-B' of FIG. 3; and,

FIG. 10 is a sectional view taken along line C-C' of FIG. 3. 

The ornamental design for a heat sink, as shown and described. 